Stud lift adapter



Aug. 19, 1958 M. WROBLEWSKI STUD LIFT ADAPTER Filed Nov. 28, 1956 Medard Wroblewski INVENTOR.

wfibwlfm United States Patent U STUD LIFT ADAPTER Medard Wroblewski, Tinley Park, Ill.

Application November 28, 1956, Serial No. 624,888

1 Claim. (Cl. 294-86) This invention relates in general to new and useful improvements in lifting fittings for machinery and more specifically to an improved stud lift adapter.

At the present time, when it is desired to move heavy pieces of steel, heavy equipment, etc., one of the bolts of the particular piece of machinery is removed and replaced by a special eye bolt. While this system has proved successful, because of the numerous sizes of bolts used in machinery, it is necessary that one keep on hand a large assortment of eye bolts. Also, since in certain instances a plurality of such bolts are required to lift a piece of machinery, it will be readily apparent that it will be necessary for one to stock a plurality of each size of eye bolts.

It is, therefore, the primary object of this invention to provide an improved stud lifter adapter which is of such a construction whereby it may be readily secured in place on a piece of machinery by existing bolts and which will receive a hook for lifting the machinery, the stud lift adapted being of such a nature whereby a single stud lift adapter will fit a large number of bolts, thereby greatly reducing the number of lifting attachments which must be maintained on hand.

Another object of this invention is to provide an improved lift attachment for machinery, the lift attachment being in the form of a strip of metal bent to generally triangular form and including a base portion and upstanding lift portions, the base portion being provided with an enlarged bolt receiving opening whereby it may be attached to an article of machinery having bolts and studs of various sizes, the lift adapter having hook receiving openings in the upstanding lift portions thereof.

Still another object of this invention is to provide an improved stud lift adapter, the stud lift adapter being of extremely simple construction and being formed of readily obtainable materials so that the manufacture thereof is economically feasible.

A further object of this invention is to provide an improved stud lift adapter, the lift adapter being of such a nature whereby a single stud lift adapter may be attached to machinery having bolts of numerous sizes, the lift adapter being so constructed whereby a minimum of lift adapters of different sizes is required to accommodate machinery and bolts of all sizes.

These together with other objects and advantages which will become subsequently apparent reside in the details of construction and operation as more fully hereinafter described and claimed, reference being had to the accompanying drawings forming a part hereof, wherein like numerals refer to like parts throughout, and in which:

Figure 1 is a perspective view of the lift adapter and shows the general details thereof;

Figure 2 is an enlarged vertical sectional view through the lift adapter and shows it attached to an article of machinery to be lifted and a hook engaged with the lift adapter for lifting the machinery;

Figure 3 is an enlarged bottom plan view rotated 90 2,848,267 Patented Aug. 19, 1958 degrees from Figure 2 and shows further the details of the lift adapter; and

Figure 4 is a plan view of the strip from which the lift adapter is formed after the various required openings have been formed therein and prior to the bending to the final shape of the lift adapter.

Referring now to the drawings in detail, it will be seen that there is illustrated the stud lift adapter which is the subject of this invention, the stud lift adapter being referred to in general by the reference numeral 10. The stud lift adapter 10 is generally triangular in outline and includes a flat base portion 12 and upstanding, converging lift portions 14 and 16. The base portion 12 is provided with a longitudinally elongated bolt opening 18. The lift portions 14 and 16 are provided with aligned, longitudinally elongated hook receiving openings 20 and 22, respectively.

Referring now to Figure 4 in particular, it will be seen that the stud lift adapter 10 is formed by an elongated sheet of metal, the sheet being referred to by the reference numeral 24. The sheet 24 is provided with rounded ends 26 and 28 which eliminate all sharp edges from the lift portions 14 and 16. Formed in the sheet 24 are the bolt opening 18 and the hook receiving openings 20 and 22. After the sheet 24 has been so formed, it is then bent to the final shape, best illustrated in Figure 2.

When it is desired to lift a piece of machinery, such as the machine 30 illustrated in Figure 2, a bolt thereof is removed and is either replaced by a similar bolt of the same size but longer, or the particular bolt itself may be used. Such a bolt is illustrated by the reference numeral 32. The bolt 32 includes a head 34 to facilitate the threading thereof into the machinery 30.

The bolt opening 18 is of a size to receive bolts of various diameters. Thus, a single stud lift adapter 10 may be used in conjunction with bolts of a wide range. In order to prevent the head 34 of bolt 32 from pulling through the bolt opening 18, there is provided a washer 36 of a desired size. The washer 36 overlies the base and incorporates with the head 34 to clamp the base portion 12 against the machinery 30. It is to be noted that the bolt opening 18 is of a size to permit the bolt 32 to be readily positioned therethrough.

Once the stud lift adapter 10 has been positioned on the machinery 30 in the position illustrated in Figure 2, a hook portion 38 of a lifting hook 40 is passed through the aligned hook receiving openings 20 and 22. The machinery 30 is then rigged for lifting.

Inasmuch as a single size of stud lift adapter 10 will accommodate bolts of various sizes, it will be readily apparent that the number of different sizes of stud lift adapters required to lift all types of machinery in a plant will be greatly limited. From practice it has been found that normally three different sizes of stud lift adapters will be necessary. However, if desired, a greater variety of stud lift adapters maybe provided.

It is to be understood that the stud lift adapters will vary in both size and size of material used in forming them. In other words, the larger the size of the stud lift adapter, the thicker the metal of the sheet from which they are formed. Also, it is to be understood that the stud lift adapters may be used individually or in pairs or groups as is necessary to lift the piece of machinery. Except for the fact that the stud lift adapter 10 may be used with bolts of various sizes, the actual function of the stud lift adapter does not distinguish from the ordinary eye bolt. replace a large number of eye bolts of different sizes, thus cutting down on the inventory of attachments required for lifting machinery.

The foregoing is considered as illustrative only of the principles of the invention. Further, since numerous However, a single stud lift adapter will 3 modifications and changes will readily occur to those skilled in the art, it is not desired to limit the invention to the exact construction and operation shown and described, and accordingly all suitable modifications and equivalents may be resorted to, falling Within the scope of the invention as claimed.

What is claimed as new is as follows:

A lift adapter for lifting machinery utilizing a stud thereof, said lift adapter comprising an initially flat metal strip bent to triangular form, said metal strip including a base portion and upstanding converging lift portions,

said lift portions having upper ends in abutment whereby further convergence of said lift portions is prevented and the lift adapter is rigidified, said base portion being provided with an elongated bolt opening for the attachment of said base portion to a machine to be lifted, said lift portions having aligned hook receiving openings in upper portions thereof, said hook receiving openings being elongated to facilitate the passage of a. hook therethrough and the centering of the lift adapter on the hook whereby the lifting force is directly transmitted in alignment with the stud to which the lift adapter is attached whereby bending movements are eliminated.

References Cited in the file of this patent UNITED STATES PATENTS 563,965 Inman July 14, 1896 1,636,312 Mickelson July 19, 1927 2,193,054 Bowen June 12, 1939 2,553,133 Conner Dec. 14, 1946 2,674,485 Jamison Apr. 6, 1954 

